SDK no longer recognized since LibreOffice 7.5

[Hercle999]

Hello.

My plugin running from Eclipse with LOEclipse properly. But it don't work when installed to LibreOffice,

Sorry but I just can say just above now. Please tell me how to investigate about this. Is any log output by LibreOffice?

==================================== I could install the plugin "oxt" file to LiblreOffice. (not from eclipse) It was indicated on menu on only Culc, (couldn't on Document, Writer) and worked only some function. (due to "Addons.xcu"?)

==================================== I installed ***.oxt in "dist" folder.

When I use "export > LibreOffice package", it occur below error. error: The RegistrationHandler.class is empty. exported .oxt extension will not properly.

==================================== excuse my poor English